Nest some more namespaces

Did someone previously suggest that all namespace had been
nested?  Silly.

Signed-off-by: Stephan Pleines <pleines.stephan@gmail.com>
Change-Id: I22278c1caaeba8b47dc46fb2ed3078c20a11e190
diff --git a/y2023_bot3/constants.h b/y2023_bot3/constants.h
index 60fe404..beca532 100644
--- a/y2023_bot3/constants.h
+++ b/y2023_bot3/constants.h
@@ -10,8 +10,7 @@
 #include "frc971/control_loops/static_zeroing_single_dof_profiled_subsystem.h"
 #include "frc971/zeroing/pot_and_absolute_encoder.h"
 #include "y2023_bot3/control_loops/drivetrain/drivetrain_dog_motor_plant.h"
-namespace y2023_bot3 {
-namespace constants {
+namespace y2023_bot3::constants {
 
 constexpr uint16_t kThirdRobotTeamNumber = 9984;
 
@@ -66,7 +65,6 @@
 // Calls MakeValues with aos::network::GetTeamNumber()
 Values MakeValues();
 
-}  // namespace constants
-}  // namespace y2023_bot3
+}  // namespace y2023_bot3::constants
 
 #endif  // Y2023_BOT3_CONSTANTS_H_